Gearing.



R. K. LE BLOND & W. F. GROENE; GEARING.

APPLIOATION FILED mm: 1, 1909.

980,972, v Patented Jan. 10,1911.

2 SHEETS-SHEET- l.

'R.'K. LE BLOND & w. P. GROBNB.

GEARING. APILIOATION IILED J'UNE}. 1909.

Patented Jan. 10, 1911.

2 EEEETS-BHEET 2.

UNITED STATES PATENT ornron.

I RICHARD K. LE B LOND AND WILLIAM F. GROENE, OF CINCINNATI, OHIO,ASSIGNORS TO B. K. LE BLOND MACHINE TOOL CO., OI CINCINNATI, OHIO, ACORPORATION OF OHIO.

GEARING.

Specification of Letters Patent. Patented Jan. 10, 1911.

Application filed June 1, 1909. Serial No. 499,541.

A a specification.

This invention pertains to certain new and useful improvements 1nlathes, and relates particularly to a lathe head provided.

with a speed changing mechanism which is designed particularly as an 1mrovement upon the structures illustrated an described in Letters Patent845,005 of February 19, 1907, and 857,562 of June 18, 1907.

One object of the invention is the production of improved means forsecuring an increase in the number of possible changesin the rate ofrotation of the spindle with respect to the constant speed power,without increasing the size of the head or housing.

A further object is to so arrange the speed changing mechanism and thecontrolling means tlerefor that in moving the handles in a givendirection, the speeds always increase ina regular proportion, thusavoiding the peculiar jumps in speeds that occur in the mechanismscovered by the above mentioned, which peculiarities are very diiiicultfor an operator to become aequainted with. i

A further object is to provide a maximum number of speed changes with aminimum number of gears. v Another object is to provide an improveddirect reading index plate for indicating to the operator the differentpositions'of the levers for securing the various speed changes.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings :Figure-* 1 is a front elevation of thehead mechanism illustrating the speed changing gearing. Fig. 2 is ahorizontal sectional view. Fig. 3 is a transverse sectional view. Figs.4 and 5 are details; and Fig. 6 is a view of our improved direct readingindex plate.

Referring to the drawings :1\ designates the main shaft driven by apulley a receiviug power from any Suitable.source- Mounted loosely onsaid sha'l't are two elongated pinions 11-. said pinions being connectedup wilh'said shaft. by means of the wedge atents members a, a,respecting/y, of a clutcha operated by a lever a". eshing with thepinion a is a gear B, and with the pinion a is a gear B. These gearstogether with a pinion b are secured to a sleeve 1) mountedon the shaftb-. Said sleeve 6 may be fastened to the shaft 6 or may be allowed torevolve loosely thereon, as desired. In

'the construction illustrated, however, thesaid sleeve 5 isloosely'mounted'on the shaft 6 and the gears are moved longitudinally bymeans of a rack b on the shaft engaged by a inion b. The object of thisconstruction is to allow thevgears \B, B and b to .move longitudinallyand at the-same time retain the gears B, B always in mesh with theinions a, a I -T e gears D, D, D are mounted on a sleeve C which iskeyed fast to a 'shaft d. Mounted on said shaft (Z so as to slideloosely on a spline and key, are gears d, d", the arrangement being suchthat the va rious speeds transmitted to this shaft (2 will be carried bysaid gears d, (1 On the hub of gear d is a clutch (l of the ordinarytooth type, adapted to pass throughan open-. I

ing in the hub of gear D to engage complementary teeth in the hub of agear D. Said gear D is loosely mounted upon the sleeve 0. It will henoted that the gear D is always in mesh with the gear e on the mainspindle E, so that when the gears (1', (P, are slid to the extremelimit, the clutch on the gear d engages with the clutch on the pinion D,thereby revolving the spindle through the gear a at the maximum speed.When the gears 11', (1 are broughtto the intermediate position, the gear01 engages the gear 0 on shaft E, and in the extreme position, the gear(1 engages with the gear 0 These last two changes we term back gearchanges, the first change being.equivalent to the open-belt on a beltdriven machine. The first six changes taking the place of the cone.

The gear d is shifted by means of a yoke F operated by a handle f andthe pinion b is rotated by a handle f In order to provide'for aproportionate movement of the sleeve 1) and the gear d we provide atoothed segment f pivotally mounted at f and provided with an arm 7"which engages are moved in the opposite direction.

turn meshes with a second pinion f securgd to the shaft f to whichpinion handle f is secured. The arrangement of the gear d and sleeve 6is such that the speed of the driven shaft will always increase in aregular proportion as the handles f f are moved in one direction, orcorrespondin 1y decreased in regular proportions as the andlIes npractice we secure eighteen spindle speeds with the fourteen gearsshown.

In order to aid the operator in making quick changes of speed and toaccurately shift the lever or handle f for the purposes above described,we have arran ed the indeX plate G which is designed to be attached tothe cover of the machine in plain view of the operator. In the middlecolumn 9 of the plate are indicated the eighteen spindle speeds ofwhichthe head is capableimmediately to the left, at g, the position of thelevers for each speed is shown. The position of the levers for gettingany definite speed can thus be determined at once by the operatorwithout being obliged to carry a series of letters and numbers in hismind,"

while setting the handles. The index plate also gives, at 9 the properwork diameter for surface speed, 40, 50 and 60 ft. a minute, from whichthe operator can determine at a glance the position of the levers toobtain the correct surface speed for the work. In

making selection the spindle speed can be entirely ignored, the operatormerely selecting the surface speed required for his work, and oppositethis can be seen at once the position of the levers. Toillustrate-suppose we have a piece of work 10 diam., which we want torun at 50 ft, Looking down the column under 50 ft. we find 10;, thenearest approximation to 10. Opposite this can be seen at a glance theposition of the levers. It will be noted that this does not necessitatetaking the speed into consideration. Again-suppose we wish to run thiswork at 60 ft. Looking down the column under 60 ft., we find 9,} thenearest to 10. Up posite, to the left, can be seen the position of thelevers to give the proper surface speed.

This table will be found useful for obtain:

ing almost any surface speed, as it can be halved for 20, 25 and 30 ft.,and doubled for 80, 100 and 120 ft. In this way it is an easy matter toselect position of the levers for any surface speed from 20 to 120 ft.

Having thus fully described our invention, what we claim as new anddesire to secure by 'Letters Patent of the United States 1s 1 1. A speedchanging device comprising a driving shaft, a driven shaft, spaced apartpinions loosely mounted on said driving shaft, speed changing mechanisminterposed between said shafts and including a shiftable sleeve, aplurality of gears thereon asaava meshing with said pinions, and meansfor selectively connecting said pinions with said driving shaft.

,2. A speed changing device comprising a driving shaft, a driven shaft,spaced apart pinions loosely mounted on said driving shaft, speedchanging mechanism interposed between said shafts and including ashiftable sleeve, a plurality of gears thereon meshing with saidpinions, and a clutch member provided with-wedge shaped arms adapted toengage either of said pinions.

4. A speed changing device comprising a driving shaft, a driven shaft,elongated pmions loosely mountedon said driving shaft, speed changingmechanism inter osed between said shafts and including a s e'eveprovided with a plurality of gears meshing with said pinions, means forshifting said sleeve, and means for selectively connecting said pinionswith said drive shaft.

5. A speed changing device comprising a driving shaft, a driven shaft,elongated pinions loosely mounted on said driving shaft, means forselectively connecting said pinions with said driving shaft, a speedchang' 2 ing sleeve provided with gears arranged to mesh respectivelywith said pinions, and speed changing gearing meshing with the gears.

6. A speed changing mechanism comprising a driving shaft, a drivenshaft, speed changing gears thereon, a speed changing sleeve, gearsthereon driven by said driving shaft, a speed changing pinion fortransmitting power to the gears on said driven shaft, gearing fordriving said pinion and operatively connected with said sleeve, andlevers controlling said sleeve and said pinion. v 7 A speed changingmechanism compris ing a driving sha t, a driven shaft, speed changinggears thereon, a speed changing sleeve, gears thereon driven by saiddriving shaft, a speed changing pinion for transmit ting power to thegears on said driven shaft, gearing for driving said inion andoperatively connected with sald sleeve, and levers controlling saidsleeve and said pinion, said sleeve and pinion being arranged toprogressively increase or decrease the speed of the driven shaft as therespective levers are moved in a given direction.

8. A speed chan ing mechanism comprising a driving shaft, a drivenshaft, speed changing gears thereon, a speed changing sleeveoperativelyconnected with said driv- CII ing shaft, a handle for shifting saidsleeve, a speed changing pinion arranged to transmit power to the gearson said driven shaft, gearing for driving said inion and operativelyconnected with said sleeve, a toothed segment provided with an arm foren aging said plnion, and an operating han 1e for rocking said segment.9. A speed changing device comprising a driving shaft, a driven shaft,elongated pinions mounted on said driving shaft, and slidahly supportedspeed changing gears permanently meshing with said pinions, means fortransmitting power from said speed changing gears to said driven shaft.

10. A speed changing device comprising a driving shaft, a driven shaft,elongated pinions mounted on said driving shaft, and slidably supportedspeed changing-gears, perma-' nently meshing with said pinions, meansfor transmitting power from said speed changing gears to said drivenshaft, and means for selectively connecting said elongated pinions withsaid driving shaft.

11. speed changing device comprising a driving shaft, a driven shaft,elongated p1nions mounted on said driving shaft, and slidably supportedspeed changing gears permanently meshing with said pinions, means fortransmitting power from said speed changing gears to said driven shaft,sald elongated pinions being of dilt'erent diameters.

12. A speed changing device comprising a driving shat't, a driven shaft,a pinion on said driven shaft, speed changing gears driven by saiddriving shaft, a slidable pinion operativety connected with said speedchan ing gears, amt arranged to operate said driven shaft, a secondpinion normally engaging the. pinion on said driven shaft, amt means forclutching said pinion with said slidablc pinion.

13. A speed changing-device comprising a driving shaft, a driven shaft,a pinion on said driven shaft, -a countershaft, speed changing gearsmounted on said counter shaft operated by said driving shaft, a drivingpinion mounted on said counter shaft and normally engaging the pinion onsaid driven shaft, a slidable pinion on said counter shaft proing pinionmounted on said counter shaft.

amt normally engaging the pinion on said 'driven shaft, said drivingpinion being iiiterposed between two of said gears, and a stidablepinion keyed to said counter shaft and having a hub arranged to engagethe hub of said driving gear.

[5. A speed changing device comprising a driving shaft, a driven shaft,a pinion on said driven shaft, a counter shaft, speed rhanging gearsmounted on'said counter shaft operated by said driving shaft, a drivingpinion mounted on said counter shaft and normally engaging the pinion onsaid driven shaft, said drivin pinion being interposed between two ofsaid gears and having its hub provided with clutch teeth, and a slidablepinion keyed to said counter shaft and having a hub provided with clutchteeth arranged to engage the clutch teeth of said driving gear.

16. A speed changing mechanism comprising a driving shaft, a drivenshaft, spaced apart pinions loosely mounted on said driving shaft, meansfor setectlvely connecting said pinions w th said driving shaft, aslidahtc sleeve, three gears thereon adapted to. mesh with saidplnions,a series of three change speed gears driven by said sleeve, and a seriesof three additional ecd gears driven by the last mentioned speet gearsand o wratively connected with said driven shaft, whereby eighteen speedchanges are secured.

' In testimony whereof we hereunto set, our hands this 29 dav of Mav1909, in the presence of two attest-ing witnesses.

RICHARD K. Ln BLUNI). WILLIAM F. (stolen a.

Witnesses v FRED LE BLoND, J 01m A. Le BLOND.

